If it is normal, it is an academic problem. If they don't know what to say as professionals, it can prove that your thesis is of high level, because they don't know what to do in this field. Why do they give you low marks? Also, you have to prove that what you write is really in this field, and you can't leave the topic content they give you and so on. If they really don't understand this field, they dare not give you low marks, otherwise you can argue everywhere. Unless you want to keep a low profile, you can get something vulgar and muddle along.